/*
* ng_message.h
*
* Copyright (c) 1996-1999 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Julian Elischer <julian@whistle.com>
*
* $FreeBSD$
* $Whistle: ng_message.h,v 1.12 1999/01/25 01:17:44 archie Exp $
*/
#ifndef _NETGRAPH_NG_MESSAGE_H_
#define _NETGRAPH_NG_MESSAGE_H_ 1
/* ASCII string size limits */
#define NG_TYPELEN 15 /* max type name len (16 with null) */
#define NG_HOOKLEN 15 /* max hook name len (16 with null) */
#define NG_NODELEN 15 /* max node name len (16 with null) */
#define NG_PATHLEN 511 /* max path len (512 with null) */
#define NG_CMDSTRLEN 15 /* max command string (16 with null) */
#define NG_TEXTRESPONSE 1024 /* allow this length for a text response */
/* A netgraph message */
struct ng_mesg {
struct ng_msghdr {
u_char version; /* must == NG_VERSION */
u_char spare; /* pad to 2 bytes */
u_int16_t arglen; /* length of data */
u_int32_t flags; /* message status */
u_int32_t token; /* match with reply */
u_int32_t typecookie; /* node's type cookie */
u_int32_t cmd; /* command identifier */
u_char cmdstr[NG_CMDSTRLEN+1]; /* cmd string + \0 */
} header;
char data[0]; /* placeholder for actual data */
};
#define NG_VERSION 1
#define NGF_ORIG 0x0000 /* the msg is the original request */
#define NGF_RESP 0x0001 /* the message is a response */
/*
* Here we describe the "generic" messages that all nodes inherently
* understand. With the exception of NGM_TEXT_STATUS, these are handled
* automatically by the base netgraph code.
*/
/* Generic message type cookie */
#define NGM_GENERIC_COOKIE 851672668
/* Generic messages defined for this type cookie */
#define NGM_SHUTDOWN 0x0001 /* no args */
#define NGM_MKPEER 0x0002
#define NGM_CONNECT 0x0003
#define NGM_NAME 0x0004
#define NGM_RMHOOK 0x0005
#define NGM_NODEINFO 0x0006 /* get nodeinfo for the target */
#define NGM_LISTHOOKS 0x0007 /* get nodeinfo for the target + hook info */
#define NGM_LISTNAMES 0x0008 /* list all globally named nodes */
#define NGM_LISTNODES 0x0009 /* list all nodes, named and unnamed */
#define NGM_LISTTYPES 0x000a /* list all installed node types */
#define NGM_TEXT_STATUS 0x000b /* (optional) returns human readable status */
/*
* Args sections for generic NG commands. All strings are NUL-terminated.
*/
struct ngm_mkpeer {
char type[NG_TYPELEN + 1]; /* peer type */
char ourhook[NG_HOOKLEN + 1]; /* hook name */
char peerhook[NG_HOOKLEN + 1]; /* peer hook name */
};
struct ngm_connect {
char path[NG_PATHLEN + 1]; /* peer path */
char ourhook[NG_HOOKLEN + 1]; /* hook name */
char peerhook[NG_HOOKLEN + 1]; /* peer hook name */
};
struct ngm_name {
char name[NG_NODELEN + 1]; /* node name */
};
struct ngm_rmhook {
char ourhook[NG_HOOKLEN + 1]; /* hook name */
};
#define ng_ID_t unsigned int
/* Structures used in response to NGM_NODEINFO and NGM_LISTHOOKS */
struct nodeinfo {
char name[NG_NODELEN + 1]; /* node name (if any) */
char type[NG_TYPELEN + 1]; /* peer type */
ng_ID_t id; /* unique identifier */
u_int32_t hooks; /* number of active hooks */
};
struct linkinfo {
char ourhook[NG_HOOKLEN + 1]; /* hook name */
char peerhook[NG_HOOKLEN + 1]; /* peer hook */
struct nodeinfo nodeinfo;
};
struct hooklist {
struct nodeinfo nodeinfo; /* node information */
struct linkinfo link[0]; /* info about each hook */
};
/* Structure used for NGM_LISTNAMES/NGM_LISTNODES (not node specific) */
struct namelist {
u_int32_t numnames;
struct nodeinfo nodeinfo[0];
};
/* Structures used for NGM_LISTTYPES (not node specific) */
struct typeinfo {
char typename[NG_TYPELEN + 1]; /* name of type */
u_int32_t numnodes; /* number alive */
};
struct typelist {
u_int32_t numtypes;
struct typeinfo typeinfo[0];
};
/*
* For netgraph nodes that are somehow associated with file descriptors
* (e.g., a device that has a /dev entry and is also a netgraph node),
* we define a generic ioctl for requesting the corresponding nodeinfo
* structure and for assigning a name (if there isn't one already).
*
* For these to you need to also #include <sys/ioccom.h>.
*/
#define NGIOCGINFO _IOR('N', 40, struct nodeinfo) /* get node info */
#define NGIOCSETNAME _IOW('N', 41, struct ngm_name) /* set node name */
#ifdef KERNEL
/*
* Allocate and initialize a netgraph message "msg" with "len"
* extra bytes of argument. Sets "msg" to NULL if fails.
* Does not initialize token.
*/
#define NG_MKMESSAGE(msg, cookie, cmdid, len, how) \
do { \
MALLOC((msg), struct ng_mesg *, sizeof(struct ng_mesg) \
+ (len), M_NETGRAPH, (how)); \
if ((msg) == NULL) \
break; \
bzero((msg), sizeof(struct ng_mesg) + (len)); \
(msg)->header.version = NG_VERSION; \
(msg)->header.typecookie = (cookie); \
(msg)->header.cmd = (cmdid); \
(msg)->header.arglen = (len); \
strncpy((msg)->header.cmdstr, #cmdid, \
sizeof((msg)->header.cmdstr) - 1); \
} while (0)
/*
* Allocate and initialize a response "rsp" to a message "msg"
* with "len" extra bytes of argument. Sets "rsp" to NULL if fails.
*/
#define NG_MKRESPONSE(rsp, msg, len, how) \
do { \
MALLOC((rsp), struct ng_mesg *, sizeof(struct ng_mesg) \
+ (len), M_NETGRAPH, (how)); \
if ((rsp) == NULL) \
break; \
bzero((rsp), sizeof(struct ng_mesg) + (len)); \
(rsp)->header.version = NG_VERSION; \
(rsp)->header.arglen = (len); \
(rsp)->header.token = (msg)->header.token; \
(rsp)->header.typecookie = (msg)->header.typecookie; \
(rsp)->header.cmd = (msg)->header.cmd; \
bcopy((msg)->header.cmdstr, (rsp)->header.cmdstr, \
sizeof((rsp)->header.cmdstr)); \
(rsp)->header.flags |= NGF_RESP; \
} while (0)
#endif /* KERNEL */
#endif /* _NETGRAPH_NG_MESSAGE_H_ */
